Worker_get_set_internal, make /get/records resilient in handling chunks in middle with zero size, was going into infinite loop

KINFRA-2186

Set max_cpu_concurrency minimum 4

KOLAP-2239

Removed unused 'track_count_map', 'track_bounds_map', 'bounds_rect' members from GaiaSet. Previously these were used to maintain per-track information (number of records, bounding box). But they have not been maintained

KOLAP-2240

Restrict persisted projections with raw strings on JoinedSets

KOLAP-2241

Added cuda sync (gaia_cuda::do_sync() function) to Worker_predicate_equijoin in code path that produced and empty index

KUI-1281

Calendar slice does not show correct tooltip for metrics other than COUNT(*)